1SSH-KEYSIGN(8) BSD System Manager's Manual SSH-KEYSIGN(8)
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4 ssh-keysign — ssh helper program for host-based authentication
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7 ssh-keysign
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10 ssh-keysign is used by ssh(1) to access the local host keys and generate
11 the digital signature required during host-based authentication with SSH
12 protocol version 2.
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14 ssh-keysign is disabled by default and can only be enabled in the global
15 client configuration file /etc/ssh/ssh_config by setting EnableSSHKeysign
16 to “yes”.
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18 ssh-keysign is not intended to be invoked by the user, but from ssh(1).
19 See ssh(1) and sshd(8) for more information about host-based authentica‐
20 tion.
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23 /etc/ssh/ssh_config
24 Controls whether ssh-keysign is enabled.
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26 /etc/ssh/ssh_host_dsa_key, /etc/ssh/ssh_host_rsa_key
27 These files contain the private parts of the host keys used to
28 generate the digital signature. They should be owned by root,
29 readable only by root, and not accessible to others. Since they
30 are readable only by root, ssh-keysign must be set-uid root if
31 host-based authentication is used.
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34 ssh(1), ssh-keygen(1), ssh_config(5), sshd(8)
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37 ssh-keysign first appeared in OpenBSD 3.2.
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40 Markus Friedl <markus@openbsd.org>
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42BSD June 22, 2019 BSD